Born in Tokyo. Graduated from the Department of Graphic Design at Tama Art University.

He has been active in a broad range of areas,mainly advertisements, book cover design, and magazines.Won the Suzuki Seiichi prize at Pater’s Gallery Competition in 2016.Won a prize in the Gallery house MAYA Competition in 2016.Bannai’s main clients include Japan Post Bank, Suntory, JAL, MINI, Shinchosha, and Magazine House.